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UNITED STATES vPATENT Ferca..

CHARLES M. ADAMS AND GEORGE W. ADAMS, OF PROVIDENCE, RHODE ISLAND.

.JEwELi-:Rs PRESS.

SPECIFICATION forming part of Letters Patent No. 530,915, dated December18, 1894.

Application filed December 26, 1893. Serial No. 494,717. (No modell) Toall toi/tom, t may concern:

Be it known that we, CHARLES M. ADAMS and GEORGE W. ADAMS, ofProvidence, in the county of Providence and State of Rhode Island, haveinvented certain new and useful Improvements in Jewelers lScrew-Presses;

and we do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention relates to that class of screw presses used for stampingsheet metal, and

which are called jewelers presses. Its object is to accomplish with onemotion of the Fig. 2, shows a vertical section of the press,

taken through from frontto back ou line x, m, Fig.l. Fig. 3, shows apunched washer. Fig. 4, is a perspective view of a cup finished. Fig. 5,shows a vertical cross section of a cup. Fig. 6, shows in section, thepunching devices seen in Fig. 2, with the punches lower down. Fig. 7, isa horizontal section of the plungers that hold the punches, on line y,y, Fig. 2. Fig. 8, represents a face view of the lower end of the innerplunger. vation of the inner plunger, separate. y

As before stated, the object of the invention is to accomplish thepunching out of the blank and the drawing of it out to form a cup, atone operation. In the screw presses that jewelers use, a blank or washeris first punched out by a partial turn of a screw, and my improvementenables the operator to draw the blank into a cup, without removing itfrom the die, by continuing the'motion of the screw a little fartheraround. This saves at least one-half of the time over the usual way ofchanging the cutting punch for a drawing punch, and feeding the blankspreviously punched, into the die one at a time by hand. There is not somuch motion of the screw required in performing the two operations atonce, asis necessary in drawing the washers after they are Fig. 9, showsa front elel punched inl the usual way, for in feeding the blanks intothe die by hand, the punch must be raised high enough to let'the fingerspass under it, while in Vpunching and drawing at the same time, thepunch is onlyl required to rise sufliciently high to allow the sheetmetal at one operation, for the blank is more accuto slide under it; andthe work is better done time they are punched out, than when sepa ratelyput in thev die by hand.

The construction is as follows:

A, is the standard of the press; B, the screw nut, and L the workingscrew.

D, is an outer plunger for holding the washer punch b. The plunger D, isfitted to slide in ways ct, a, cast on or otherwise at` tached to theface of the standard A, and the plunger F, is vfitted to slide in achamber made through the plunger D, and is connected to the screw L, bya split collar c, screwing into the upper end of the plunger.

The plunger F, is recessed in at its lower end atj,f(see Figs. 8 and 9)to hold the drawing punch d. The recess j, is carried in be` 'ratelycentered for the drawing punch at the youd lthe center of the plunger,as shown by the dotted lines in Fig. 8, to receive the hanged head ofthe punch d, and a hole s, is made in the center to receive the stem ofthe punch. The manner of inserting this punch in its place, is asfollows: Before the punch socket b, isput into the end of the plunger D,the head of the punch d, is passed up inside ythe plunger D, into thewide part of the reside of the plunger D. See Fig. 2.v The washer punchg, has a hole through its center to receiveand guide the drawing punchd, and the punch g, is held in the socket b,

by a set screw Z, in the socket. The inner plunger F, has a spline atm', fast in it, fittingin a slot in the other plunger to prevent it fromturning. The plunger F, and its 8 cii roo punch d, are moved `by thescrew independent of the plunger D, which moves only when locked to theplunger F.

The locking devices are constructed as follows: A recess fr', is madethrough the front of the plunger D, and a little projectionf, is madejust below the opening t'. Ablock n, is tted to slide in the recess 7l,and its ends are beveled ott at o, o. The recess t, is made narrowerabove the block n, so that its sides will project over that block, andprevent it from rising in the recess. A recess a', is made in front ofthe plunger F, near the top,

leaving the 'part fu, `projecting out the full size of the plunger; but-thespace m, between the recess and the upper end of the plunger, isplaned off enough to be below the part c, and the upper edge n', of `therecess, is beveled od at the. saule `angle as the corners 0, of theblock n. A plate'C, is attached to the head of thestandard in front, bymeans of the bolt t, which passes through a slot inthe plate and screwsIinto the Ahead of the standard. The plate C, extends down in front ofthe press, to about the middle of the plunger, and has its lower endturned square in toward the plunger, to `form a ledge p. A recess r, iscut out of the inner side of the plate C, just above the ledge 79, andhas its upper edge beveled off to like `angle as the corners o, of blockn. The outside .of the nut B, above the flange by which it is fastenedto the standard A, has a screw thread made on it, and a collar J, split:through on one side,`with a vertical flange on each side of the split,has a screw thread made Aon its inside, itting into the thread on thenut, and a bolt s', passing through the two flanges, serves to close andtighten the collar on the nut wherever it `may be set. This collar isset to limit the distance the screw can be turned down.

The operation `is asfollows: lVith the pants in position as shown inFig. 2byturningjt'he screw L,the plunger F,is carried down and carrieswith it the plunger D, by the block n, the inner end of which projectsinto the recess a', in the plunger F. This block fn, is Lprevented frombeing pushed outby thebeveled su rface, because of its outer end bearingagainst the inner face of the vplate C, until the plunger Y D, has gonedown far enough for the block ln,

to be pushed out of the recess a', into `the recess r, and the block n,will bring up against the led ge p, and the motion of the plunger D,will be stopped thereby. The point at which the plunger stops, is whenthe punch g, has just cut through the sheet metal, and the plate C, canbe set by means of the slot and bolt t, at any desired point for `thispurpose;

but the continued motion ot' the screw L, carries the plunger F, downfarthenas the low space m, 0n the plunger, allows its upper end to passthe block n, until its punch d, has passed down into the blank cut bypunch g, the distance necessary to form the cup. The `return motion ofthe parts is in this way: rllhe motion of the screw L, being reversed,the plunger F, will be drawn up until the lip n, catches under the innerend of the block n. This will begin to carry the block n, and plunger d,up, and the outer end of the block n, will be pushed clear into therecess a, by the bevel on the recess r. This brings all parts inposition, as when the operation described began. By setting the plate Clower down, the block will be held from being pushed out and the presscan be used as a single acting one.

Having thus described our improvements, we claim as our invention- 1. Ina screw press, two plungers or `inan- 4drels with punches, operated bythe same screw, in combination with said screw, substantially asdescribed.

2. In a screw press, thelcoinbination of two sliding punches operated bythe same screw, and means for connecting one ot' said punches with theother punch, and for disconnecting it from said punch, and means forlocking said punch when `so disconnected, to prevent its further motion,substantially as set forth.

3. Ina screwpress, the combination of two slidingplungera one workinginside theother and operated by one screw, the inner plunger beingrecessed in its lower end as described to hold a drawing punch, a socketin the outer plunger holdinga cutting punch, said cutting punch havingahole through it to receive the drawing punch, substantially asdescribed.

A. In a screw press, the combination of two sliding `punches operated bythe same screw and slid-ing one i-n theother, the outer plunger `havinga recess through it, and a recess in the front of the inner plungerhaving projecting edges at the lower edges of the recesses in the,plungers andthe upperside of the recess in the inner plunger beveledaway, a front plate adj ustably attached to the press standard andhaving a recess in its lower end the 'bottom of which projects inwardrand the upper side of which is beveled away, a block iitted to slide inthe recess in the outer plunger and having its ends beveled,substantially as described.

CHARLES M. ADAMS. GEORGE W. ADAMS. Witnesses: l BENJ. ARNOLD, JAMES E.ARNOLD.

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